[boost] Re: Variant size bug?

From: Eric Friedman (ebf_at_[hidden])
Date: 2003-11-05 20:27:48

David Abrahams wrote:
> Eric Friedman <efriedman_at_[hidden]> writes:
[snip]
>>Unfortunately, I don't have any better ideas. Maybe for now I'll just
>>go with variant< variant_types<seq> >, as ugly as I find it.
> 
> 
> I think I'm with Peter Dimov, if I understood him correctly.  For
> interoperability reasons, it has to be a metafunction.

What do you mean by 'interoperability reasons'? Regardless of whether 
the public interface is a metafunction or not, ultimately the created 
type will need to be some form of variant< ... > to retain compatibility 
with 'plain' variants. (FYI, this is similar to the approach I use for 
the recursive_variant metafunction.)

> 
>    boost::variant_over<type-seq>::type
> 
> ??

Sure, that looks nice (for the public interface).

Eric